In the admin section, when clicking on a link that leads to a page in
the public area, sometimes the page was opened in the same window and
sometimes it would open in a new window, with no clear criteria
regarding when either scenario would take place.
This was really confusing, so now we're more consistent and open
(almost) every link in the same window. The main reason behind it is
simple: if we add `target: _blank`, people who want to open those links
in the same window can no longer do so, so we're taking control away
from them. However, if we don't add this attribute, people can choose
whether to open the link on the same tab or to open it on a new one,
since all browsers implement a method to do so.
More reasons behind this decision can be found in "Opening Links in New
Browser Windows and Tabs" [1].
We're keeping some exceptions, though:
* Opening the link to edit an investment on the same tab would result in
losing all the investment filters already applied when searching for
investments, so until we implement a way to keep these filters, we're
also opening the link to edit an investment in a new tab
* For now, we're also opening links to download files in a new window;
we'll deal with this case in the future
[1] https://www.nngroup.com/articles/new-browser-windows-and-tabs/
This way it will be easier to change the behavior of all table actions,
like adding ARIA attributes. In the past, when we changed the behavior
of the `link_to` method, we had to change all table action classes.
Note the CSS could probably be improved to avoid duplication with other
button style definitions. However, that's fine because we're going to
change the style of the links soon.
For the same reason, I haven't bothered to style every single link the
way it was until now.
In some tables, we had "actions", and some columns were also links
pointing to some places. Having both of them at the same time is
confusing, particularly since traditionally the links in the columns
pointed to the same place as some of the actions (although that's not
the case since commit 48db31cd).
We're still keeping links in tables which don't have an action column.
For instance, the proposals table has a "select" button which would be
harder to use if we had action buttons next to it.
This partial was going to get too complex since in some places we've got
different texts, different URLs or different confirmation messages.
While we should probably try to be more consistent and that would make
the partial work in most cases, there'll always be some exceptions, and
using a partial (with, perhaps, some helper methods) will become messy
really quickly.
